Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionRoyce & Associates Lp
ManagerChuck Royce
Latest Disclosed Ownership284,476 shares
Latest Disclosed Value $ 12,809,954
Royce & Associates Lp reports 37.07% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 12, 2026 - Royce & Associates Lp filed a 13F-HR form disclosing ownership of 284,476 shares of Amkor Technology, Inc. (MX:AMKR) valued at $12,809,954 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 452,029 shares of Amkor Technology, Inc.. This represents a change in shares of -37.07% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 284,476 -167,553 -37.07 12,810 -28.22 0.1264
2026-02-09 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 452,029 -209,712 -31.69 17,846 -5.04 0.1810
2025-11-12 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 661,741 -11,019 -1.64 18,793 33.09 0.1874
2025-08-11 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 672,760 108,051 19.13 14,121 38.47 0.1449
2025-05-06 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 564,709 138,161 32.39 10,199 -6.94 0.1105
2025-02-10 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 426,548 33,798 8.61 10,958 -8.82 0.1017
2024-11-06 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 392,750 -39,848 -9.21 12,018 -30.58 0.1092
2024-08-13 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 432,598 -15,062 -3.36 17,313 19.96 0.1618
2024-05-13 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 447,660 -93,178 -17.23 14,433 -19.79 0.1288
2024-02-12 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 540,838 -48,173 -8.18 17,994 35.17 0.1662
2023-11-09 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 589,011 -33,020 -5.31 13,312 -28.07 0.1356
2023-08-07 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 622,031 -142,300 -18.62 18,505 -6.95 0.1797
2023-05-23 2023-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 764,331 -23,600 -3.00 19,888 5.26 0.1991
2023-05-04 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 764,331 -23,600 20 0.1991
2023-05-23 2022-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 787,931 -198,000 -20.08 18,895 12.40 0.1986
2023-02-13 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 787,931 -198,000 19 0.1975
2022-11-03 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 985,931 -168,000 -14.56 16,810 -14.05 0.1901
2022-08-04 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,153,931 -11,743 -1.01 19,559 -22.75 0.2014
2022-05-05 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,165,674 113,262 10.76 25,318 -2.96 0.2150
2022-02-07 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,052,412 103,081 10.86 26,089 10.15 0.1949
2021-11-10 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 949,331 -217,088 -18.61 23,686 -14.21 0.1771
2021-08-06 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,166,419 -53,800 -4.41 27,609 -4.57 0.1897
2021-05-10 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,220,219 41,000 3.48 28,931 62.69 0.1945
2021-02-08 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,179,219 217,500 22.62 17,783 65.10 0.1469
2020-11-12 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 961,719 14,600 1.54 10,771 -7.62 0.1162
2020-08-07 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 947,119 87,440 10.17 11,659 74.09 0.1284
2020-05-12 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 859,679 53,000 6.57 6,697 -36.14 0.0913
2020-02-06 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 806,679 46,592 6.13 10,487 51.61 0.0937
2019-11-13 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 760,087 101,000 15.32 6,917 40.68 0.0640
2019-08-12 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 659,087 181,100 37.89 4,917 20.46 0.0444
2019-05-09 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 477,987 323,185 208.77 4,082 301.77 0.0345
2019-02-11 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 154,802 154,802 1,016 0.0091
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.